2013年9月15日星期日

Bionics in phyllotaxis theory combined with grinding mechanism

Ordinary abrasive grinding wheel surface rendering random arrangement, making a large abrasive grinding work can not really participate, but the surface of the chip space wheel is difficult to control, resulting in a grinding wheel during the work surface easily  grinding wheel , grinding, high temperature, France tangential grinding force and the grinding force ratio, abrasive grinding wheel performance is not easy to fall off, and give full play to other issues. This article will bionics in phyllotaxis theory combined with grinding mechanism, by photolithographic  Diamond blade and composite  synthetic diamond , the abrasive disc by sunflower seeds arranged evenly distributed in the form of grinding wheels, abrasive grinding wheel to achieve the orderly arrangement, it is important to improve the grinding performance of significance.

The use of 3D modeling software UG devised abrasive wheel arrangement phyllotaxis

Firstly, based on bionics Phyllotaxy devised a theory based on the arrangement of sunflower seed disc wheel and carried out engineering preparation of the wheel. Mathematical models studied H.Vogel mid-sequence divergence coefficient k phyllotaxis impact on grain  abrasive grinding  by H.Vogel mathematical model describes the structure of the arrangement of abrasive grains, and using 3D modeling software UG devised abrasive Phyllotaxy wheel arrangement. Proposed arrangement of abrasive wheel Phyllotaxis  synthetic diamond , summed up the mask preparation process and electroplating processes, experimental studies on the mask aperture and thickness on the quality of the sand, electroplating plating solution  Diamond blade  and process parameters on the quality of the coating impact of the use of lithography and electroplating processes were prepared with different parameters k phyllotaxis grit.

Cognitive grinding mechanism and facilitate the development of grinding technology

Therefore, how orderly abrasive wheel surface arrangement to improve grinding wheel performance, improve surface quality and improve the grinding efficiency, grinding areas has become a hot issue; while grinding mechanism and cognitive promote the development of grinding technology has important scientific significance. First, in order to solve the controllability of  grinding wheel  grinding wheel surface  cubic boron nitride , this paper presents the botany phyllotaxis theory is applied to the surface of abrasive grinding wheel arrangement, phyllotaxis parameters analyzed the impact on grain distribution law, and in accordance with cylindrical  abrasive wheels  arrangement model designed abrasive wheel phyllotaxis arrangement, using UG secondary development arrangement established Phyllotaxy wheel model. Secondly, through the electroplating process and lithography prepared Phyllotaxy arranged cylindrical abrasive wheel.

Grinding has become a sophisticated and ultra-precision machining of the main processing method

With manufacturing science and technology development, has become a grinding precision and ultra-precision machining of the main processing methods. In the field of grinding, the grinding wheel of physical characteristics, structural characteristics, and  polycrystalline diamond  of the grinding force, the grinding temperature, the surface quality of the workpiece and the grinding wheel wear has a great influence. In the traditional  synthetic diamond  of wheel, abrasive grinding wheel surface in a random distribution of rendering. This not only results in a random distribution during grinding wheel easy to plug, resulting in grinding burns, premature wheel failure, but also to achieve cognitive grinding mechanism and controllability of the grinding process to bring greater difficulties.

Compensating axial misalignment distance and surface roughness of the workpiece can be reduced

Therefore, how to achieve the orderly abrasive wheel surface arranged to improve grinding performance, has become a field of many scholars grinding hot issues of concern. For example: JCAurich, O.Braun other scholars use motion simulation for abrasive grinding  Diamond blade  geometric arrangement has been optimized to get the best abrasive arrangement, P.Koshy, IAWasaki and  synthetic diamond  abrasive grain, etc. dislocation arrangement. Simulation results show that the axial distance and misalignment compensation reduces the surface roughness of the workpiece. Based on the engineering studies drawn abrasive grinding wheel wear and surface roughness.

Grinding mechanism to cause great difficulties in cognitive

In the field of grinding, superabrasive grains as ordinary plating on the surface of abrasive grinding wheel presents shuffled, the wheel contact with the workpiece cutting area of ​​the abrasive state of the use of statistical methods alone to describe a  Diamond blade  mechanism which cognitive cause great difficulties; same time, because of the random  Synthetic diamond  of abrasive, abrasive can not really make a lot of work involved in grinding, and grinding wheel surface chip space is difficult to control, these factors led to the grinding process easily lead to wheel face blockage, the surface thermal damage and abrasive performance and other issues can not be fully;

The early 1980s on the successful development of a new type of abrasive

Microcrystalline alumina ceramic sand abrasive technology appraisal was held in four, the project passed the technical appraisal. Microcrystalline alumina ceramic abrasive is an American Norton & Company and 3M Company in the early 1980s on the successful  synthetic diamond  of a new type of abrasive, which uses a special process and raw materials, with sub-micron microcrystalline structure, which has toughness,  abrasive wheels , good self-sharpening, etc., in high-grade abrasive and coated abrasives aspect was widely used. As the product with excellent performance, expensive,  abrasive grinding turers has taken security measures, and thus in a very long time, the domestic only know this abrasive, but has been unable to get the sample studied.